Insulating device



FIG. 1 is a top, front, left perspective view of an insulating device showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a right side view thereof.

The broken lines showing the remainder of the insulating device are for the purpose of depicting environmental subject matter which forms no part of the claimed design. The stipple shading in the drawings is a drawing convention to represent curvature; it does not illustrate material, surface ornamentation, or surface decoration. 

CLAIM The ornamental design for an insulating device, as shown and described. 